Grinding body for tube and drum mills



Jan. 29, 1929. 1,700,667

A. BUES GRINDING BODY FOR TUBE AND DRUM MILLS Filed June 13, 1927 Fen/0%.

AH 07% ej Patented Jan. 29, 19 29. I I '7 I r V I I I AUGUST BUIES, F BERLIN-LICHTEBFELDE, GETRJWALTY, ASSIGNOR TOTHE FIRM G.

IPOLYSIUS, OF DESSA'U, GERMANY, A PARTNERSHIP.

GRINDING BODY FOR TUBE AND DRUM MILLS. Application filed June 13, 1927, Serial No. 198,359?;. and in Germany october 19, 1 924."

This invention relates to a grinding body Fig- 1 being a side view of the outer and the for tube and drum mills. According to my interior grinding body and Fig. 2 a-longitudi- 40 invention the grinding body is so designed nal section through the outer and interior that an increased output of the mill will regrinding body shown in Fig. 1.

5 sult therefrom at the same time obtaining According to" the drawing the grinding greatest quantities of finely ground material body is constructed in the manner of a helifrom the mill. These features are due to a cal spring withconvolutions adjacent to each 45 particular construction of said grinding body. other as may be seen from Figs. 1 and 2 of My invention consists essentially therein, the drawing. The grinding body a consists 7 0 that one or more bodies are provided as inof a helically Wound spring with adjacent terior' grinding bodies within theouter convolutions 1),]2, the ends 0 ofsaid spring grinding body, which latter body consists being properly bentpreferably in a direction 50 ordinarily of a spiral of spring steel. Acwhich is diametrical with respect "to said; cording to my invention, furthermore, said spring for'preventing the interior grinding interior grinding bodies, which may consist body (Z from falling out of the outer grindv of bolts, steel-balls or the like are permanently ing body a. The interior grinding body cZ carried within the outer grinding body, and is shown as consisting of a bolt of steelor the 55 protected against falling out of the same by like which is provided within the outer grindproperly bending the ends of said spiral of ing body a and prevented from falling out spring steel. of, the sameby the bent ends 0 of the outer The material to be ground may enter the grinding body. According to the drawing grinding body at one of its ends and will be there is only one interior grinding body oZ em- 60 subject to the grinding process by means of ployed, it is evident, however, that also a pluthe interior grinding bodies during passing rality of such interior grinding bodies cl may through the interior of the outer grinding be used forthe purpose of my invention.

body. The sizes of the grinding bodies may I claim: V be chosen as desired, preferably according to q "A grinding body for tube and drum mills the size of the mill and the specific construcconsisting of an outer memberin the form tion of the same as well as according to the of ahelically wound spring with diametri- 1 nature of the material to be ground. 7 The why or approximately diametrically bent grinding body according'to this invention ends, and an interior member, said interior may be employed for dry as well as for wet member being prevented from falling out of 70 mills. The filling or interior'grinding bodies said outer member by meansof said bent according to my invention may be employed ends, substantially as described and for the irrespective of the fact, whether the mill is purpose set forth. 7

provided with a silex or a steel lining. In testimony whereof I aflix my signature;

In the drawing an example of the conr V struction according to my invention is shown, g AUGUST 

